Improvement in sash-fasteners



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WASHINGTON u c C. EBERLY.

Patented Nov. 20, 1877.

Sash-Fastener.

WITNESSES UNITED STATES PATENT OFFICE.

CYRUS EBERLY, OF COLUMBUS, OHIO.

IMPROVEMENT lN SASH-FASTENERS.

Specification forming part of Letters Patent No. 197,257, dated November20,1877; application filed I October 9, 1877.

thereon, which form'a part of this specifica tion.

My invention belongs to the class of sashlocks which have. a slidingbolt thrown forlwgvard by a spring, and which are opened by a Itconsists in a novel manner of constructing and combining the parts, ashereinafter described and claimed, so as to form a simple, cheap, anddurable lock; and the advantages of the construction will be fullyunderstood from the following description.

Figure 1 shows the lock with the parts clearly exposed. Figs. 2 and 3are longitudinal sections through the center of the lock, Fig. 2 showingthe bolt held back by the key, and Fig. 3 the normal position of thebolt when the key is out of the lock. Fig. 4 is a crosssection of thelock.

The lock is intended to be embedded in the side of the sash; but it maybe made to screw onto the sash without deviating essentially from theconstruction described, and the end of the bolt may be beveled orrounded, instead of square, as shown.

The bolt a is rectangular in cross-section, and the spring I) bearsagainst the end of the bolt and the end of the casing c. The end of thebolt has the recess d, which receives the end of the spring and keeps itin place. The stud e on the back side of the bolt slides in a slot inthe casing, and prevents the bolt from being thrown out too far.

A portion of the bolt is cut away, leaving a space, g, for the key f,which space approximates in shape tothe quadrant of a cylinder.

The straight side of the key-space g is slightly inclined from aperpendicular to the side of the boltcso that when the bolt is drawn in,and the key and bolt are in the position shown by Fig. 2, the pressureof the spring will retain the key in that position. When the key isturned in the reverse position, as shown by dotted lines in Fig. 3, itlooks the bolt, and prevents it from being pushed or worked in from theoutside of the window.

The window-casing should be provided with mortises at regular distancesto receive the bolt.

The lock may be used for the meeting-rails of window-sashes, and when soapplied it has many advantages over the catches in common use. When thekey is out of the lock the bolt is always kept out by the spring, and itbecomes a simple spring-catch, which catches when the window is shut,and requires the use of a key to open it. The key ordinarily remains inthe look, so that, for general use as a window-catch, it is easy toopen. When the key is removed it becomes a secure fastening.

With most of the sash-locks in common use it is an easy matter for aburglar to remove a pane of glass, and then insert his hand and unfastenthe window. With this look, the key being removed, that cannot be done,and the window may even be left up partially at the bottom, and, thelock being fastened, it would still be safe.

I claim as my invention The combination of the sliding bolt a, havingthe stud e and the open key-space g, the spring 1), case 0, having slotto receive stud e, and key f, the whole arranged so as to operatesubstantially in the manner described, for the purpose set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

CYRUS EBERLY.

Witnesses:

JOHN G. MCGUFFEY, OHRIs'rIAN SEITER.

